Testing device for carburetor valves



Sept. 25, 1951 A. FEGEI. TESTING DEVICE FOR cARBUREEoR vALvx-:s

Filed July 25 1949 Patented Sept. 25, l1951- FOR'CARBURETOR TESTINGVDEVISE ALVES ibert regel.' vvhit/ierCalif.v Application July 25,1949,Serial No. '106,691

v',Ifhis invention relates to a testing device for an automatic Valve ofa carburetor` andit is an objectkof the invention to provide a device ofthis kind providing means whereby there can be determined if the valveis properly seating `and opening.` v 4 Itis also an object of theinvention to provide a device, of this kind for use in connection with adiaphragm operated valve member to determine 4if there is leakageoccurring at the di-aphragm.

The'invention consists in the details of :construction and in thecombination and arrange- `ment ofthe several parts of my improved gaugefor carburetor valvev whereby'certain advantagesv are attained, as.willbe hereinafter more fully set forth. i

lIn order that myhinvention may be ,better understood, 'I. will 'nowproceedv to describe the same'vwith reference to the accompanyingdrawings, wherein n y y Figure 1 is a view vin perspective of testingdevice:constructed` in accordance with an embodiment of the invention;

Figure 2 is a vertical sectional View taken lengthwise through Figure 1with parts in elevation;

VFigure 3 is a detail sectional view taken substantially on the line 3-3of Figure 2; and

Figure 4 is a sectional view'taken substantially on'the line 4-4 ofFigure 2.

This invention relates to a testing device for carburetors. In a type ofcarburetor now in general use there is provided a valve that opensthereby permitting the feeding of more gasoline, under certain operatingconditions of the motor, namely, .at speeds of 70 `M. l?.v H. or betteror when climbing a very steep grade. In the drawing this valve I .is-.shown in cross section. You will notevthat ther valve is provided with adiaphragm-2, a needle valve 3, and a spring 4. In operation, this valveis subjected, 'when themotor is idling, toa vacuum pressure of twentyvinches offnrercury on the side of the diaphragm indicated by the arrow.As the throttle of the 'carburetor is opened and the speed of the motorincreases, the vacuum of the intake decreases. When the vacuum withinthe manifold reaches seven inches of mercury, the spring 4 overcomes thevacuum pressure against the diaphragm 2 and the needle valve 3 opensthereby permitting considerably more gasoline to enter the mixingchamber of the carburetor. As mentioned before this condition isdesigned to take place'at speeds of 'I0 and above and/or when the car islabor- .1Ds up a relatively steep grade. The purpose of mm, Kol. "1s-4e)scribed carburetor valve.

kconnected to some convenient spot on the intake flow of vacuum energyby way of a passage I8 'enclosing the diaphragm 2.

. 2 the valve is, of course, to provide the economy of a small jet underlow demand conditions and yet provide the additional fuelnecessaryvunder high demand conditions. Frequently this valve I, isY orbecomes defective, either the diaphragm 2 begins to leak or the spring 4because of vibrations weakens or" tightensf Because prior to this therehas been no convenient means of checking this valve; it has been thepractice when adjusting the carburetor, to remove the old valve andreplace it with a new one. Many times'in so doing a perfectly good valveis discarded and it is replaced by a new valve defective in manufacture.Y v g l Y The' presentinvention provides a convenient and. certain meansof checking the above de- A rubber hose I0 is manifoldof a car,customarily the windshield wiper connection, and to a port II to admitthe to a gauge I2, a bowl I3, and by way of connecting passages I 8a andI8b to a gauge Il .and a Y bowl I5; said bowls being mounted in spacedrelation upon a at support S and between the same and a flat head memberM. As best 'shown in Figure 4 it is to be noted that this energy iscaused to Ilow through -a restrictor I6, in the passage I8a, beforereaching the gauge Il and bowl I5 and through a restrictor I1 in thepassage I8, before reaching the gauge I2 and bowl I3. The passage I8bleading to the gauge I4 and the bowl I5 from the passage I 8a, isprovided with a restricted bleeder I9 to atmosphere for a purpose to behereinafter described, Leading from the bowl I5 is a port 20 that opensinto the body of the valve 3 to be tested below the diaphragm 2, andleading from the bowl I3 is a port 2| that opens, into the interior of acover 22 Both of the bowls I3 and 15are lled with a fluid, preferablykerosene, to a height to cover the lower ends of dive tubes 20 and 2|',depending from the ports 20 and 2I,nres'pectively. 'I'he passage I8b isprovided with a manually operated needle valve 2| that selectively shutsout or permits a flow of atmosphere through the port 23 and the passageI8 is provided with a manually operated needle valve 25 that selectivelycloses or opens Va port 26 leading to atmosphere.

To operate this testing gauge the manual needle valves 422 and 25 areclosed and the vacuum energy being generated by the motor is directed tothe port Il. When this is done, the gauge I2 should indicateapproximately twenty air will travel frc'msthe valvejbodyfthrough;theVport 20 andthedive ltube 20', causing'vbiibbles-tof rise through thefluid in bowl I5. Now, if the valve leaks either through its diaphragm 2or*V needle valve 3, it is readily discernibleandcan,

be corrected. The iinal thing to be determined.,

about the valve I is whether or not the valve is opening at the propertime.

I8b, and the ports 20, 2I, 23, 24 and 28, open through the side edges ofthe member M, as does also the port 26.

From the foregoing description it is thought to be obvious that a gaugefor carburetor valve constructed in accordance with my invention isparticularly well adapted 'for use by reason of the convenience andfacility with which it may be assembled and operated.

Iclaimr Apparatus for testing an automatic valve for a carburetor, whichvalve comprises a body carrying. a-diaphragmmwhich is subjected on oneside In order rto do this the manual needle valve 24 isy opened,-toythat point that the gauge I4 reads one inch of Inercury. This is doneas it is known that-within..

the carburetor approximately one inch of mercurygvacuum energy ispresent.; Nextth e valv.e, 2521's opened and' this will admitairfthroughthe, port. 26 and*A causa-the vacuum press.ureto; drop; thegaugeI2pbeing. watchedgand DQlSCeftaken.

when.` bubbles appear -within l,the bowl I 5: inrelaf tion .to therindicated vacuum f pressure-,on ,gauge I2.; Theneedle valveSopenswhen;thevacuum, energyr against the` lower. side of lthediaphraglrn` 2 reaches seven, inches orY less ofV mercury by reason :off theV springv 4. overcoming the vacuum.

energy.

'In-vieweof the foregoing, it isbelieved apparenti thatfithejdevice rherein comprised clearly indi-.fY

cates if the diaphragm 2 of the valve is leaking., if f the needlezvalve3Jseatsproperly, and iffthe needle valve opens at the desired time. Thevariouss passages.k are .provided with restrio'tors.` as

shown to make simpler thek adjustmentof'pres sure by themanual needlevalves.

' Tliecover.22 isprovided with. a gasket 2B":and4

merelymests on. the ground surface o 'the .gauge thereby making a vacuumtight cover.

Thebowls Iii-andy I5 each comprises a.cylin drical: tubular body29ppreferably transparent.- andy having its lower end kclosed by-.a discclosure .i

bothof the bodies v29.

-The disc A closures 3-and themember M are heldin desired placement:with respect to the bodies 2B-bythe bolts 35I- whichextend from below;through thecentral portionslof the closures 3l andgthread .into theunder face of the. member .f l\/\I.vithr the, heads :32 1thereof iseated'in recesses.v

32 formedingthe top surface of 'the`v` support aS.'

Thefmember M;,substantiallymidway of the.-

bowls I3 and I-ighasV disposed therethrough 'an openingS in ,whichissnugly engaged from above'` Itis also` clearly showninthe .accompanyingdrawings thatgthefport II, passages IVI8;V Isa and ltoireduced manifoldpressure and havingga fluid passage through the same communicating atone end with a-space on the other side of the diaphragm; a.. spring..closed needle valve normally closing the other end of the passage and aport leading laterally from the passage between its ends; said apparatuscomprising a flat support, a.. flat head member-having an'openingY inwhich a partgoifthevalve body seats vto positionvthev diaphragm. withthe said one side-thereof upwardly directed, a: coverv member adapted -fto be placed'onthezhead member over the diaphragm to form a chamber inwhich said one side'ofethe diaphragm is housed,v a pairof vacuum gaugesmountedA 'on-t the headV member and interconnected,Y by vacuumconductingpassagesA iny the latten means forrcoupling a-vacuumf lineywithgonewof said passages, a pairvoffluidv receptacles-'having said headmember disposed over and supported byY the tops thereof, meanssecurnguthe f head1'A member andl saidreceptacles, in spacedrela-V tiononsa'id'support, each of said gauges being,4v in communication with onereceptacle, saidjhlead' member havinga p ort opening atone,end .int.o,said chamber and jat its other `endinto-oney of4k said receptaclesa divetube depending. from, the, last namedpassage down,into.-one..receptacle, said ,head member having Iav port .connecteH ing with the lateralportofwsaidvalve bodyifatf one ,end and opening intotheother ofsaidreceptacles at. its, other end, a secondf dive-ftube; depending fromthe last named port in said ,heads member, into.thee.otherreceptaclaf,said head member, having?, an? air bleedTv port.connectingg with; the passage'leadingyto .that gaugewhich is incommunication withf-the'saidotherrecep:4

tacle, Yand a. valvey controlled lcommunication passagebetween eachgauge-andthe atmosphere.i`

l ALBERTFEGEL;-

REFERENCES-'CITED f The:gifollowing,Y references arefo record intheleaofthis patentz':

UNITED STATESQPATENTS;

23216257 Shiroyanf y Sept.- 16,.` 1947.1-

